Chemistry practice
5
Nuclear reactions involve changes in the composition of ________.
nuclei
What are the negatively charged particles of an atom
electrons
An atom with ____ electrons in its outer energy level is most stable.
(except H and He)
8
In a Lewis dot structure, the dots represent _________________.
valence electrons
What is the atomic mass of Gold? Feel free to round.
196.97
What is the identity of an alpha particle?
helium nucleus
12
The amount of energy required to remove an electron from an atom is called ____________________.
ionization energy
What type of bond results when nonmetal atoms share valence electrons?
covalent bond
how many atoms are in C6H12O6
24
What is the nuclear symbol of a beta particle?
0/-1 e
What are the outermost electrons called?
An atom's ability to attract and bind to electrons is called ___________________.
electronegativity
Would a solid substance with a high melting point that dissolves easily in water most likely be an ionic compound or a covalent compound?
how many atoms are in 3MgCl2
9
Which type of nuclear reaction results in two nuclei combining to form a single, larger nucleus?
nuclear fusion
nacl is ionic or covalent?
Ionic
Which element on the periodic table has the highest electronegativity?
Fluorine (F)
In a bond between carbon and fluorine, would electrons be exchanged or shared?
shared
Balance the following chemical equation
Fe + Cl2 = FeCl3
2Fe + 3Cl2 = 2FeCl3
The half-life of radium-222 is 1,600 years. If you start with 1,600 atoms of radium-222, how many would remain after 6,400 years?
100 atoms
What could Potassium (K) pair with for an ionic bond?
Which element has the largest atomic radius?
(according to the general trend for atomic radius)
Francium (Fr)
If two covalently bonded atoms have electrons that are shared unequally, is the bond polar or nonpolar?
polar